Grading-machine.



PATENTED NOV. 26, 1907. G. S. WHITNEY.

GRADING MACHINE. APPLICATION FILED AUG.28. 1907.

2 SHEETS-SHEET l.

No. 871,976- PATENTED NOV. 26, 1907. G. S. WHITNEY.

GRADING MACHINE.

APPLIOATION FILED AUG. 28' 1907.

2 SHEETS-SHEET 2.

Wilbzwswsfi I M76715??? UNITED STATES PATENT ()FFICE.

GUY S. WHITNEY, OF LINDSAY, CALIFORNIA.

' GBADINQMACHIN'E.

Specification of Letters Patent.

Patented Nov. 26, 1907.

To all whom it may concern: Y

Be it known that I, GUY- S. WHITNEY, a

citizen of the United States, residing at Lindsay, county of Tulare, and State of California, have invented a new and useful Gradin -Machine, of which the following is a s eci cation.

his invention relates to grading machines and the objects of the invention are to provide for adjusting and operating the plows and scraper by power mechanism controlled by levers.

The accompanying drawings illustrate the invention, and referring thereto :Figure 1 is a plan view of the machine. Fig. 2 is a side elevation of the machine.

The machine comprises a main frame 1 rectangular in shape, which at the rear is supported by wheels 2 and at the front by wheels 3. A depending bracket 4 at the front of the frame 1 acts to support a plow frame 5, the latter having a pivotal connection therewith at 6, the frame 5 having a fork 7 at the front rovided with a ring 8 for the attachment of motive power, such as a traction engine or teams. It will be noted that the motive power is attached directly to the plow frame 5, the latter having merely a su porting connection with the frame 1 of t 'e machine, and thus the .machine properly does not act as an intermediary in pulling the plows, but acts as a support therefor.

The plow frame 5 comprises two rearwardly diverging bars, to each one of which is bolted a series of posts 9, carrying at their lower ends plows 10. Pivoted to each bar 5 is a link 11 and each link 11 is at its upper end pivotally connected to a crankarm 12 which is formed on a cross shaft 13 mounted in bearings 14 on the frame 1.

The cross shaft 13 ma be termed the plow controlling shaft, an is rovided with a crank 15, to which is attac ed a connectin rod 16. The rear end'of the connecting ro 16 is provided with a roller 17, which rides in a grooved cam 18, the cam 18 being loosely mounted on a clutch shaft 19. The cam 18 has 'a conicall cupped face 20, which is adapted to be 'ctionally e aged with a cone clutch member 21, the atter being splined on shaft 19, and having a grooved collar 22 which is engaged b a orked lever 23, the latter be pivote to a cross-bar 24. B shift' t e lever 23 the clutch 21 may 0 mov dlf into frictional engagement with cam 18, and the latter thereby caused to rotate with clutch shaft 19 and actuate plow shaft 13 through the medium of connecting rod 16, so thatas the plow shaft 13 is rotated its crank arms 12 acting through links 11 serve to elevate or lower the plow frame 5 to the desired elevation, the plow frame swinging on its pivot 6, and in this manner the cutting depth of the plows 10 may be controlled. For example, they may be dropped .into plowing position as indicated in Fig. 2, or by throwing in clutch 21 the crank arms 12 may be turned through half a revolution or any part thereof to elevate the plows above the surface of the ground. As soon as the plows are thus elevated, the clutch 21 should be thrown out of engagement with cam 18. To lower, the plows from their raised position, the collar 21 is again thrown into engagement with the cam 18 and the crank arms 13 revolved through another half revolution whichrestores them to the position shown in Fig. 2 with the plows in position for plowing. I

The shaft of one of the wheels 2 carries a sprocket 25, clearly seen in Fig. 2, which is connected by a sprocket chain 26 with a sprocket 27 mounted on the end of shaft 19. An intermediate shaft 28 is journaled in bearings29 on the frame 1, and a gear 30 on the intermediate shaft 28 is adapted to mesh with a ear 31 which is mounted on a sleeve 32, the latter being splined on clutch shaft 19 and having a grooved collar 33, which is engaged by a forked lever 34 pivoted to the 28 is a grooved cam 37 and associated witheach cam 37 is a sliding bar 38, having a roll 39 which en ages'the grooved cam 37. Each bar 38 is sli ably supported in a standard 40, and the rear end of each bar 38 is pivotally connected by a link 41 with the upper end of a lever 42, each lever 42 being pivoted at 43 to a standard 44. Pivotally connected to the lower end of each lever 42 is a link 45,

the rear end of each link 45 being pivotally connected to an arm 46, each arm 46 being A attached to a scraper 47. The scraper-47 at each end is pivoted at 48 to the rear ends of a pair of draw-bars. As shown in'Fig, l the rear portions of draw-bars 49 converge forwardly and unite at an intermediate point 50, from which point they continue forward parallel, and their front ends pass between fork 7, before referred to, and are connected with the ring 8, The front ends of drawbars 49 are likewise pivoted at6 By oper-. ating the lever 34, shaft 28 may be caused to rotate as before described, andfthrough the medium of, cams37 may be oaused'jto'act:

through the before described linkage to r'ock, thescrap'er 47 on-its pivotal points;48 todump the same. Inorderto support the scraper 47 while in dumping positionpapa r preventing the scraper from dragging of circular runners 51 aresecuredtoeach end of the s'crape'r, so; that when chescraper is indumping positionthefrunners 51 ride on I the ground and support the scraper thus earth which has been dumped,

under its own weight. I I

frame, supporting wheels therefor,

' on the plow frame, a scraper frame pivot'ally'.

SuPPOIt-d t the r 'of. he'main 'frame and A extending rearwardly beyond the plow fi-ama s a scraper on the scraper frame, and mechanism operated by said Wheels for adjusting the height of the plow frame and controlling-the scraper. I I f 2.- A grading machine comprising a mainframe, supporting wheels therefor, a plow frame pivotally supported at-the front of the mainframe and extending rearwardly, plows on the plow frame, a scraper frame pivotallyj supported at the front of the main frame and e ding I rearwardly, beyond the plowframe, a scraper on the scraper frame, mechanism operated by said wheels for swinging the plow frame to various elevations, and

swinging the scraper on the scraper frame.

3. A grading machine comprising'a mam frame, supporting wheels therefor, a low frame pivotally supported at the front 0 the I main frame and extending rearwardly, plows. on the plow frame, a scraper frame pivotally supported at the front of the main frame and v i shaft'or stand idle. igradingzmachine'co I I H frame, supporting wheels.."thereforya plow" frarnepivotallysupportediat theffront of the I V extending rarwardl'y beyond the; plow frame, a scraper on thesoraper frame, mech-" anism operated by said wheels forr'swinging the plow frame to various elevations, mechanism. operated .by said wheels, for swingingv the scraper on the scraper frame, and circular I runners on the scraperforsupporting 'the- I scraper when the latter is inverted I 4, A'grading m'aQhine comprising a main frame, supporting whe'els therefor, a plow frame pivotally' supported at the front of the main frame and extendingrearwardly, plows swinging the scraper on its frame, al gear on the intermediate shaft," a; inion' on the; cam shaft, aco'ne clutch-on t e camshaft-one member of which is connected toi the pinion,

and a leverfor shifting the pinion into mesh with the gear and simultaneously closing. the v I cone clutch. mechanism operated by said Wheels for I y hand at Lindsay, vCal., this 21st day-of August, 1907, 1

In testimony whereof, have hereunto set J. E. SEEeMmLaB, W. SPARHAM.

on the plow frame ,a scraper frame p votally supported at the front of the mainframeand extending rearwardly beyond gthe I'plow frame, a scraper on the scraper frame,-a,cam' j shaft geared to the wheel's,fa canton the camshaft, a crankshaft, Ilihks connecting. the; crank shaft and plow frame;ia]-rod.-connected y 'tolthe crank shaft and having operativeconnectio'n' with the cam, and iclutch means'for I causing the cam to rotate: with'the clutch 90 nection with the cam, and-c111 ch meansgfor'. causing the cam- 'Ito -r'otate the clutch shaft or 'stand idle, an/int'ermediate'shaft', cams on. the "intermediateishaft linkage; between the latter eams and "-theseraper for 

